She said: "The only change was that it was explained to me before I did that movie ['Trainwreck'] that if you weigh over 140 pounds as a woman in Hollywood, if you're on the screen it will hurt people's eyes ... I didn't know that so I lost some weight to do that but never again."

Meanwhile, Amy previously revealed she was told at her first audition that she should either lose weight or put on a lot of weight so she could be cast in the role of the "fat friend".

She said: "At my first audition when I was 21, they were like, 'You should either lose weight or gain a bunch of weight, like be the fat friend or the romantic lead.' Can you believe they said this? But I feel like more than other people saying it, it's a self-inflicted thing. We put pressure on ourselves and hold ourselves to this unrealistic standard ...

"I want to throw my hands in the air after reading a mean Twitter comment and say, 'Alright! You got it. You figured me out. I'm not pretty. I'm not thin. I do not deserve to use my voice ... All my self-worth is based on what you can see. But then I think f*** that."